Please answer ASAP!! Q1)The force of gravity between 2 objects A and B is 100 N. When the mass
of B is doubled and the distance between them is quadrupled. What is
the new force?
Q2)A ball is thrown 60 m vertically into the air.
a) What was its initial velocity?
b) How much time does it take to reach the highest point?

Which statements best describe medical uses for radioactive isotopes? check all that apply. radioactive isotopes are used to detect medical problems. high-energy gamma rays are injected into the body. radioactive isotopes are used to treat some diseases. radiation is used to kill cancer cells. radioactive isotopes are directed at tumors from outside the body.